As a seller, this very thing happened to me, and while I don't use USPS
much, my impression is that it's increasingly rare. Specifically, I
prepared the label yesterday morning, dropped it off at the P.O.
yesterday afternoon, and the tracking shows n...
It's grayed out for me. I saw someone mention that you need two or more
listings, at which point you can change it for all of them, though that
being required doesn't make sense. I only have one.
